Scrum

BHNT #112: the fifth BHNT in 2026. The title is inspired by the issues around Bambulab (Boo). Your hacks do not have to be connected to the title (bonus points if they do though) Please RSVP and bring your hacks! There are 8 dynamically allocated Slots that consist of 5min presentation + 5min conversation with the audience. To refresh your memories or get familiar with the concept - see some old hacks here: [https://bhnt.c-base.org](https://bhnt.c-base.org/) Hope to see you - looking forward! [RSVP here](https://platform.openmeet.net/events/bhnt-112-bamboo-hacks-8zv0v)

Late Start Tonight! Please note, we will be starting at 7:15 tonight! Feel free to arrive at 7:00 and grab the table reserved for us -- against the window and next to the bookshelf. Mention the host's name, Andrew -- they know me. For those about to write -- let them come to Berlin! Think of us as a writers' room on the Iron Curtain. We help you turn ideas into Beat Sheets, and Beat Sheets into Scripts. Whatever your level -- we help you to raise your game. We also do a lot of table reads. And provide constructive feedback. And talk about books and films and shows we love -- and draw inspiration for our own projects from them. We workshop works-in-progress. We give you the tools -- you find your flow. Broadly speaking, we have ways to make you write!

We are back in the c-base! Do you already run NixOS and want to talk to other people or want an introductory session with some NixOS users. Just bring your machine! Usually there are no topics, we just sit in front of our computers, talk about stuff, debug some problems or review some PRs on nixpkgs. There are drinks usually available from the c-base bar. If you can't find us. just ask around or ask in irc (#krebs on hackint)

The next **Berlin C++ Meetup** hosted by think-cell takes place on **Tuesday, May 26**. Join us for an evening with the Berlin C++ community! This meetup is a chance to step away from your day to day work, meet other developers, exchange ideas, and have real conversations about modern C++ in a relaxed setting. \-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\- ## **Talk** ### **Contract assertions on virtual functions** *Timur Doumler – Citadel Securities* Contracts assertions were introduced in C++26, but they cannot be applied to virtual functions. To close this gap, we first need to answer the question: how should contracts assertions behave in the presence of inheritance and runtime polymorphism? In this talk, Timur explores why this problem is harder than it looks. He reviews existing approaches from other languages, such as Eiffel, D, and Ada, highlights why they don’t fully translate to C++, and outlines the key design challenges involved. He then presents a concrete proposal for how contract assertions on virtual functions could work in C++, balancing correctness, safety, and usability. Along the way, the talk touches on good API design, the true meaning of the Liskov substitution principle, and how to reason about program correctness. \-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\- 📅 **Date & Time:** Tuesday, May 26, 2026 – 18:30–21:30 📍 **Location:** Le Wagon Coding Bootcamp, Rudi-Dutschke-Straße 26, 10969 Berlin 5th floor 🕒 **Agenda** 18:30 – Doors open 19:00 – Talk + Q&A 20:40 – Pizza, Drinks and Networking \-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\- **RSVP now to save your seat!**

Hello! I’m organising a coworking + socialising session for all of us who are working on projects (e.g. our own creations, freelance or remote work) but don't feel like sitting alone at home. 🙂 To ensure that we have time for both socialising AND working, we will be using the so-called “Pomodoro” technique: **50 mins deep work** (silent), followed by **10 mins break** to socialise. And then repeat! You are welcome to join whatever your personal background is, and whatever project you are working on. I (the host) speak English and German, so either language is fine. ——————————————————- AGENDA: * **Short Intro** Tell us who you are and share something about what you will be working on today * **Pomodoro Session** \- 3x \(3h\) Each Pomodoro session consists of 50 mins focused “deep work” (no talking, no interruptions, **phones on silent mode**) -> then 10 mins break: a chance to share your progress with others -> Repeat * **15 mins Wrap Up** Celebrate what you achieved and get to know others 😊 ———— The location is **Espresso House near Checkpoint Charlie** (they have multiple outlets - so be sure to go to the correct one!) Wifi + power plugs are available - but best to bring a fully charged laptop, just in case 🙃 You **do not** have to pay anything. But since we are using the café space, it is common courtesy to buy at least one drink (coffee costs roughly **4 Euros**).

Come along, grab a coffee, shut up, and write! We will do at least two sessions of each 45 minutes of writing and two breaks. We will start the first writing session at 10:45. For space reasons we only allow a limited number of attendees, so please update your RSVP if you can't come. We'll probably be grouped around the large table in the back room's center. In the summer, also outside. Looking forward to seeing you there!

Do you like to play football - but relaxed and not with competitive or aggressive players? Are you a bit lazy, a bit old, a bit unfit or not so talented? Are you tired of insecure bros who only want to show off their skills? **Then [Lousy & Lazy Football](https://www.instagram.com/landlsc/) is the right thing for you!** We are a group of friendly people who just want to have a relaxed kick. All genders, ages (+18) and nationalities welcome. **Feel free to join the waitlist even if it seems long - sometimes we make the event larger and play on two pitches (24 players, four teams) or even three pitches (36 players, six teams), depending on demand.** Note: **We do not allow high-studded football boots during our sessions.** To avoid injuries, we only play with "Multinocken" (multistuds) or shorter. Please have a look here: [link](https://www.11teamsports.com/de-de/fussballschuhe/multinocken/). Rules for lazy & lousy football 1. **Don’t be competitive** 2. **No hard tackling/sliding challenges** 3. **Support new players by giving them the time and space to play the ball** 4. **Don’t dribble past multiple players (trying to take on a player is fine but at no point should you be trying to dribble past multiple players).** 5. **Don’t close down the defenders too quickly. Give the team a chance to play the ball out.** 6. **Rotate the goalkeeper** 7. **Be a teamplayer** Waiting list: This meetup is for members of the Lousy & Lazy Sport Club. If you want to try out our lousy & lazy sport events, you can do a trial run (Probetraining).

In the previous meetup, we discussed a difficult question: **Will AI replace Scrum Masters and Agile Coaches?** This session builds on that conversation. Instead of focusing on what might disappear, we’ll focus on: **What will become more valuable.** 🧠 **What you’ll learn** We’ll explore the shift from: * Why facilitation and process knowledge are no longer enough * The shift from team-level focus to system-level thinking * How organizational design becomes a key capability * What skills will make you stand out in the coming years Grounded in Org Topologies™, we’ll look at: * Why many roles operate in **output-driven, incomplete setups** * The shift toward **outcome-oriented, complete mandates** * Why organizational design becomes a **core capability** * How AI amplifies this shift rather than causing it 🔑 **Core idea** The future is not about becoming a better Scrum Master. It’s about becoming someone who can: * see the organization as a system * identify structural constraints * redesign how work, learning, and decision-making happen 🎤 **Format** * \~30 min talk * \~30 min Q&A and discussion * \~30+ min Networking 👥 **Who this is for** * Scrum Masters & Agile Coaches seeking their next evolution * People struggling to create impact in their current setup * Leaders interested in system-level change * Anyone thinking about their next career step 💡 **Why join** Many people feel that “something is changing.” This session helps you **name the shift** — and position yourself within it. Btw: This meetup prepares the ground for a special session with the author of *10xOrg* in June.

/// English below /// **TANZE IN DEN SONNENUNTERGANG — SCHWEBEND AUF DER SPREE** Komm an Bord des ältesten Fahrgastschiff Berlins, der Kaiser Friedrich, für eine Sonnenuntergangsreise voller Verbindung und Rhythmus — erlebe die Magie des Ecstatic Dance, schwebend auf der Spree, umgeben von Licht, Wasser und Bewegung. [DJ Kawoq](https://m.soundcloud.com/annette-assmy) führt uns durch eine immersive Klangwelt aus tribal Fusion, Weltmusik und lebendigen südamerikanischen Klängen. Von erdiger Perkussion bis zu hypnotischen Melodien lädt dich jeder Beat ein, dich zu erden, loszulassen und aufzusteigen — und trägt dich durch Wellen aus Energie, Emotion und gemeinsamer Freude. Bitte sei am 29.05.2062 um 18:45 am Anleger **Alte Börse** (Burgstraße 27, 10178 Berlin) am Hackeschen Markt. Tickets und weitere Infos zum Schiff gibt's [hier.](https://kaiserfriedrich.berlin/event/ecstatic-dance-bootstour-berlin/) ///English/// **DANCE INTO THE SUNSET FLOATING THROUGH BERLIN** Step aboard for a sunset journey of pure connection and rhythm as we invite you to experience the magic of Ecstatic Dance—floating along the Spree, surrounded by light, water, and movement. Guiding us through this immersive soundscape, [DJ Kawoq](https://m.soundcloud.com/annette-assmy) weaves together tribal fusion, world music, and vibrant South American vibes. From earthy percussion to hypnotic melodies, each beat invites you to ground, release, and elevate—carrying you through waves of energy, emotion, and collective joy. Please arrive by 6:45 PM at the Anleger **Alte Börse** (Burgstraße 27, 10178 Berlin) near Hackescher Markt. Tickets and more infos on the ship [here.](https://kaiserfriedrich.berlin/event/ecstatic-dance-bootstour-berlin/)

Join us for an upcoming in-person Lean Coffee meetup. Lean Coffee is a lightly-structured meeting format where the attendees create the agenda. Bring your management challenges; whether you're managing people, products, processes or beyond, and solve them together with peers from a diverse set of backgrounds. This event is great for anybody trying to create better ways of working and wants to share with + learn from others trying to do the same.

**The TypeScript Berlin meetup is back!** After a long break, we're reviving the meetups for 2026 and we'd love to see you there. Whether you've joined us before or you're coming for the first time, welcome! Come round for talks, snacks, good conversations, and a chance to connect with other TypeScript devs in Berlin. *** **🎙️ Interested in speaking?** We have an ongoing call for speakers for this event as well as future ones. [Fill it out here](https://tally.so/r/jaGa1J). *** **📅 Schedule** * 18:30 - Doors open, drinks and snacks 🍕 * 19:00 – Welcome 🤝 * 19:05 - Talk 1: TBC 🎙 * 19:35 - Talk 2: TBC 🎙 * 20:05 - Break 🥤 * 20:20 - Talk 3: "**Prisma Next: AI-Native, Graph Migrations, Extensions & Middleware**" by [Will Madden](https://www.linkedin.com/in/willmadden/) 🎙 * 20:50 - Wrap-up * 21:00 - Doors close 👋 *** This meetup is organised by [Prisma](https://www.prisma.io/). By attending the event, you agree to abide by our [Code of Conduct](https://www.prisma.io/event-code-of-conduct). For questions, reach out to events@prisma.io

**Exciting news: The second LeadDev Berlin meetup 2026 is here** Get ready for the upcoming LeadDev Berlin Meetup! Join us for our next LeadDev meetup on May 28th, and enjoy an evening of networking and lightning talks. Drinks and nibbles will be provided on the night, thanks to Zalando. **Date: Thursday, May 28th, 2026** **Time: 6 - 9 pm** **Location: Zalando BHW, Hedwig-Wachenheim-Straße 7, 10243 Berlin** **Spaces are limited - you must RSVP to attend.** **Note: Please bring a Photo ID with you. It will be required to enter the venue.** **Schedule:** **06.00 pm** \- Arrival\, networking and refreshments **06.30 pm** \- Welcome from host \- Zalando **06.40 pm** - [CJ Jenkins](https://www.linkedin.com/in/christina-jenkins/) \- Using AI Embeddings To Generate More Performant Features **07.00 pm** - [Ruben Nagoga](https://www.linkedin.com/in/ruben-nagoga-89666717/) \- How Ways Of Working Are Evolving **07.20 pm** \- Break **07.45 pm** - [Karima Mzoughi](https://www.linkedin.com/in/karima-mzoughi-0992b598/) \- Beyond Delivery: How Engineering Leaders Drive Real Business Impact **08.00 pm** \- Closing remarks **08.05 pm** \- Networking **09.00 pm** \- Close You can also [join our Slack workspace](https://click.pstmrk.it/3s/leaddev.com%2Fjoin-slack/d6eN/Oee1AQ/AQ/a9b371b4-7191-44ca-9609-20d7a87b5535/2/mdj-K8GnZN) to keep up to date with everything in our Berlin community. **Join the channel #leaddev-berlin or #berlin.** If you need further information or have any questions, please email [hello@leaddev.com.](http://hello@leaddev.com./) Here is a friendly reminder of our [Code of Conduct](https://click.pstmrk.it/3s/leaddev.com%2Fcode-conduct/d6eN/Oee1AQ/AQ/a9b371b4-7191-44ca-9609-20d7a87b5535/3/U3Fu0fY6qI) to help protect the safety of our community. Don't forget to share this with your colleagues who may be interested, and keep an eye out for upcoming meetups later this year. **Thank you to our Berlin meetup partner Zalando.**

While we are approaching the middle of the year and KotlinConf is just over - we are thrilled that Trade Republic hosts us again! So mark the date! **Line-Up:** 👉 **Lists, Sequences, and Flows: Scaling Data Processing in Kotlin without Melting Your Memory.** *by Daniela Valero* In this talk, Daniela shares her journey of meeting a major backend deadline while managing a data pipeline's memory footprint. You’ll learn how to transition from eager List operations to lazy Kotlin Sequences and jOOQ Streams (using database fetchSize chunking) to keep memory usage flat. Finally, we’ll explore using Kotlin Coroutines and Flow to introduce safe concurrency so your data processes quickly without straining your database. 👉 **The show must go on** *by Blagoja "Baki" Stamatovski* **👉 TBD** **Speaker Bios:** 🗣 **TDB**

Improv theater at its best: Samt & Sonders at the Monbijou - open air right by the river Spree, sparked by you, and boosted by special guest Beat Brenning (live beats and sounds). We start at 6 p.m. so you can still enjoy the sun and a drink and be part of a hilarious show. Berlin.Unscripted is an improvised comedy show, where your ideas and suggestions inspire everything that happens on stage. Funny, spontaneous, chaotic, and completely unique! Created live in the moment.

Come out to Improving for our monthly iOS and Mac meetings. This Month's Presentation: Nothing yet. (You should volunteer). What is Cocoaheads (http://cocoaheads.org/)? CocoaHeads is a group devoted to discussion of Apple Computer's Cocoa Framework for programming on MacOS X and iOS (including the iPhone, iPad and Apple Watch). During monthly meetings, members present on their projects and offer tutorials on various programming topics. What is BuckeyeCocoa (http://buckeyecocoa.org/)? BuckeyeCocoa is a group of Objective-C/Swift developers/enthusiasts. We host monthly Cocoaheads and near-weekly NSCoder meetings in Columbus, Ohio. The meetings are free to attend. Presentations! Presenters welcome! We are always in need of people willing to present material. Any Swift and/or Objective-C related topic is welcome. Times can be 5 minutes (i.e. lightning talks) to a maximum of 2 hours. Interested? Contact info is on the BuckeyeCocoa website. To volunteer for a presentation contact us at @BuckeyeCocoa on Twitter. Follow us on Twitter! @BuckeyeCocoa (https://twitter.com/#!/Buckeyecocoa/) For more information: http://buckeyecocoa.org/

**Important time note:** Please plan on arriving between 5:30 and 6:00 as the elevators lock after 6 and you'll need to message us and we'll need to come get you. The building address is 4450 Bridge Park The entrance is 6620 Mooney St, Suite 400 You will need to scan your ID at the door to get a visitor badge. **Abstract** Like it or not, AI agents are now capable of turning a quickly written paragraph of requirements into a pull request that is ready to be integrated into real-world production applications and it's now our responsibility to make sure AI doesn't go rogue and take down prod - or corrupt our data by misunderstanding the requirements or our existing schemas. In this session we'll explore strategies to protect our codebases through unit and integration testing, documentation, and code review along with additional ways of providing context and guard rails to our AI agents as they carry out the work we've assigned them to do. By the time we're done, you'll have a firm grasp of the problem and understand some helpful options for protecting your codebase from vibe coding mishaps getting YOLOed into prod. **YouTube Link** https://youtube.com/live/BltmWMH1zG0?feature=share

PLEASE NOTE!!! This event will be In-Person for our very 1st Improving collab! If you know the [Columbus Unity group](https://www.meetup.com/columbus-unity-user-group/) location, we'll be at the same place. This is our 1st event and are doing a soft launch with limited attendance. 1st come 1st serve. If you want to be there and we fill up, please email me at [info@thecogg.com](mailto:info@thecogg.com) and I'll be in touch. All street parking is free on Sundays but you can also pay to park in any of the local garages. See image of [parking map here](https://drive.google.com/file/d/1Mr9_LFIggbs-0_Zd3AJTGNqEhgMf2TzQ/view?usp=sharing). \-\-\- On the last Sunday of the month, we're having our usual end-of-the-month social gathering with our GameDev Meetup meeting. There will be announcements and presentations followed by some social networking Let's continue the conversations with good vibes and friends. All are welcomed from all ages and backgrounds to this public event. If we can, we'll be streaming or uploading the video later via our COGG YouTube channel here: [https://www.youtube.com/@TheCOGG/streams](https://www.youtube.com/@TheCOGG/streams) (Also please do subscribe if you have not done so!) No game development experience required! If you are interested in doing a 20 minute game development related presentation, please fill out our form online here: [https://goo.gl/forms/lVdTJZiNJewlPJuj1](https://goo.gl/forms/lVdTJZiNJewlPJuj1) Or e-mail us at info@thecogg.com with the following: Your Name, Company/Affiliation, Name of Your Game/Topic, Description, Tech Needs, and Your Contact. Be sure to check out our Discord for real time news updates: [https://discord.gg/NrBhuNQ](https://discord.gg/NrBhuNQ)

We’re still working to get more people into these Meetups, but our goal is to give PlayYourCourt members a few social tennis outings each week in addition to your practice sessions and Challenge League matches. These Meetups are co-ed, super laid back, and all skill levels are welcome. Post your skill level and a suggested court in the comments section so we can round up as many players as we can for some tennis fun! Also, if you’re looking to meet new practice partners or play some matches and you aren’t already in the PlayYourCourt Community, you can go here to see what we’re all about and sign up: https://www.playyourcourt.com/tennis-community/columbus-oh/meetup/ If you love tennis, we’d love to have you! Be sure and watch the quick video that explains how everything works. Happy hitting! - Scott

Christians in Tech is a community at the intersection of faith and technology. Our meetups are designed to spark meaningful conversations, promote knowledge sharing, and encourage growth—both in your career and your spiritual walk with God. Whether you're an experienced professional or just starting your tech journey, CIT welcomes you. Our Website [https://linktr.ee/citcbus](https://linktr.ee/citcbus) Sponsors and Partners * Improving (Venue Sponsor) * Bethel World Prayer Center (Fiscal Sponsor) * Fruits & Roots (Coffee Partner)